Solved! How to connect jamo e7 sub to Harman Kardon HK 680 amp

[moteski]

I have Harman Kardon HK 680 and when I comnect amp pre out to Jamo e7 subwoofer sound is to low. How to connecr subwoofer to HK 680? I tried rca to rca because is mono,1 rca to 1 rca, not Y rca. Pre out amp to Jamo E7.

https://www.fein-hifi.de/images/product_images/original_images/hk680spurg hk 680 back


http://78.img.avito.st/640x480/2197779578.jpg jamo e7 back

I also connect to tape out end the sound was ok but correction of laudnes only goes from SUB. And I alweys mast chek corect out button.
Tnx☺

 

[jsmithepa]

Don't know what to tell ya. Can always open it, trace the preout and if ur lucky there 2 adjustment pots.

 

[moteski]

Problem Solved with Y adapter to Sub and 2xRca to Amp...tnx